@PhdThesis{FreiThesis, author = {Christopher Frei}, school = {TU Graz}, title = {Sum of units in number fields and function fields}, url = {https://diglib.tugraz.at/download.php?id=576a7d366da0d&location=aleph}, year = {2011}, groups = {PhdThesis, Project09 (Tichy), Student}, }